The thing that I found suprising in the 39 Clues book 10 was that the other Cahill family branches gave up their clues because they thought that they were untrustworthy.

I found that very suprising because the branches haven't gotten along for centuries. It was also suprising because in the other books only a few kind Cahill's would willingly give all their clues to two children. At first I didn't believe what I was reading so I reread it and it made sense of why they did it because everybody thought that the Madrigal's were evil but it turned out that they were trying to reunite the Cahill branches ever since they became apart. If I was in a Cahill branch I wouldn't want to give up my clues to two children so I can relate to the people who didn't want to give up their clues but did it out of the kindness of their hearts.

It was just unbelieveable how they just handed their clues to Amy and Dan. I'm sure Amy and Dan will just have to reunite the rest of the branches and become one big family. They will sure make Grace and their parents very proud by doing so, and then they can try to relax untill one of their meaner reatives returns. This is what I found suprising about The 39 clues book 10.